Improvement in machines for tapping pipe-fittings



3Sheets --Sheet2. J. I... POPE.

- Machines for-Tapping Pipe Fittings. N0.139,476. PatpntedJuneSJBYS.

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JOHN L. POPE, OF CLEVELAND, OHIO.

IMPROVEMENT IN MACHINES FOR TAPPlNG PIPE-FITTINGS.

Specification forming part of Letters Patent No. 139,476, dated June 3,1873 application filed December 12, 1872.

To all whom it may concern:

Be it known that I, JOHN L. POPE, of Cleve- L land, in the county ofOuyahoga and State of ing is a full, clear, and complete descriptionthereof, reference being bad to the accompanying drawings making part ofthe same.

Figure l is a plan view of the machine. Figs. 2, 3, and 4 are sideelevations. Fig. 5 is a detached section. The figures on plate 3 areenlarged detached sections.

Like letters of reference refer to like parts in the several views.

The nature of this invention relates to a machine for tappinggas-fittings, 850.; and the object thereof is to facilitate the work oftapping, and to effect the same in a uniform manner. Of said machine thefollowing is a detailed description. 7

In the drawings, Ais a circular frame mounted upon the legs B. In theupper outer edge of said frame is closely fitted a rotating carriage, O,in the face of which is a circle of cogs or leaves, 0, whereby it ismade to revolve by means of miter-wheel D, actuated by a belt andpulley, E, Figs. 1 and 3. To the periphery of said carriage, andvertical to the plane thereof is secured a stay, F, Fig. 2, in which arearranged the taps G H I. The taps G I have a horizontal relation to eachother, whereas the tap H has a vertical position, and a right-anglerelation, to the taps G I, as shown in said Fig. 2. Each of said taps isfitted in a mandrel or spindle, J, driven by a miter-pinion,,K, securedto the mandrel by means of a groove and feather, so that the mandrel canwork backward and forward in the pinion, and at the same time be rotatedtherewith for operating the taps. In the out er end of each mandrel isfitted a feedscrew, L. Said screws are fixed in the studs M by a nut, Mand screw-head N, Fig. 11, so that they cannot turn, hence the mandrelsrun upon the screws. Said screws work in anut, J, Fig. 11, screwed'onthe end of the mandrel, as shown in said figure. The pnnons K, re-

Fig. 1, projecting from the side of the frame A, above described. frameA is secured a segment of gear, P, the teeth there-ofbeing on the underside, as shown in Figs. 3 and 4, the purpose of which will presently beshown. The device for holding thecouplings or gasfittin gs while beingtapped is a clamp, consistingot' thejaws a b, Fig. 5. Said figurerepresents the under side of a detached section of the machine, adetached view of which is also shown in Fig. 6. The jaw b is rigid butadjustable, whereas the jaw a is movable, and held in proper relation tothe rigid jaw b by the guide-rods '0, Figs. l, 5, and 6, and on which itis made to slide toward and away from the fixed jaw by an arm, d, Figs.2 and 6, to which it is attached. Said arm projects from one end of ashaft, 0. Fig.

7, having its hearings in the stay Q, Figs. 2' l and 5. From theopposite end of the shaft depends a short arm, f, Fig. 7, whichrepresents a detached View of the shaft and the two arms. From the shortarm projects a pin, g, into a slot, h, Fig. 6, made in the end of aslide, 1', a detached view of which is shown in" Figs. 6 and 7. Aroundthe stem'of said' slide is coiled a spring, j, the purpose of which willpresently be shown.

Having described the construction and arthe stem end upward. Theposition of the coupling when thus held in the clamp will be such as tobring the stem thereof in direct line with the vertical tap H, and thearms of the T in direct line with the two horizontal taps G I. In thisrelative position of the T to the taps said taps are fed into thecoupling by the screws L at the same time the taps are revolved by thewheel and pinion K N, said wheel N being rotated by thepinionR in itsengagement with theinduction segmental gear 0. The engagement ofthepinion It with the segmental gear 0 is effected by the revolutionofthe carriage (l by means ofthe pinion l) and the circle of cogs orleaves 0, the revolution thereof being in the direction of the arrows,Fig. 1. By the time that the carriage has revolved the distance of thesegment 0, the taps PATENT OFFICE.

On the upper side of the have been worked into the coupling to the depthrequired for the thread therein. "A reverse movement is now required forthe withdrawal of the taps from the coupling. This is accomplished bythe eduction segmental gear P, under which the pinion It is carried bythe rotary movement oi'the carriage. By the time that the pinion It hastraversed the length of the segment P. the taps have been withdrawn fromthe T or coupling, which is now discharged from the clamp by the pin E,Figs. 3, 6, and 7, being caught by, and running along the inside of, thecam F, Fig. 5, attached to the under outside edge of the frame A, at theinstant that the taps, or the pinion 1) operating the taps, leaves thesegment 1. The efi'ect or the cam on the pin or stud is to draw inwardlythe slide 11, as indicated by the arrow in Fig. 5. This inward movementot the slide pushes back the arm f in consequence of its slottedconnection therewith, as shown in Figs. 6 and T. During the time thatthe short arm f moves back the arm at moves outward, thereby forcingback the movablejaw a from the fixedjaw 1), between which thegas-fitting was held. This opening of thejaw allows the fitting orcoupling to drop out, which is immediately replaced by another, duringthe time that the taps are passing from the eduction-segment P to theinductiomsegment 0. By the time that the pinion 1t reaches the segment0, the pin or stud of the slide slips from .its engagement with the cam,and spring j reverses the movement of the arms f d, thereby drawing backthe jaw a and clam ping the fitting between them for being tapped, whichis immediately done by the taps oper ated as above described, t, 0.,during the time that the pinion B is passing over the induction-segment0, and which are again withdrawn from the fittings by a reverse actionof I the taps efiected by the pinion R in traversing theeduction-segment P, as above said.

In the above-described machine one system of three taps only is-shown,which is thought to be sufficient for illustrating its construction andoperation ,whereas, in practice, seven systems of three taps each willbe used, as will be evident on examination of the drawings. A greater orless number, however, can be employed, as the size ot'the machine maydemand.

This machine represents a capacity for seven systems of working-tapsofthree taps each. One

or more of the seven systems are at once tapping into the fittings,while the same number at the same time are being withdrawn therefromwhereas one system is in transit from the eduction-segment P to theinduction-seg ment 0, during which time the clamp is opened, the tappedgas-fittin g drops out and is replaced by another.

The fixed jaw b is made in two sections, as shown in Figs. 9 and 10,which sections are secured to each other, and also to the guiderods 0,by a screw 0, Fig.8. By this means the jaw 12 can be easily adjusted inits relation to the taps for the accommodation of different couplings.

What I claim as my invention, and desire to secure by Letters Paten is--l. The rotating carrier 0, having, or provided with, a system of teeth,0, and pinion R, in combination with the segmental gears O and P,substantially as and for the purpose set forth.

2. The frame or bed A, constructed as de- 1 in combination with the armsor levers (If and jaw a, substantially as specifiechfor the purpose setforth.

6. The spindles J, gears K, driving-gears N R, in combination with therotary carrier 0 and segmental gears O P, all constructed and arrangedto operate in the manner as and for the purpose set forth.

7. The stationary feed-screw L, in combination with jam-nut M, spindleJ, and nut J, as and for the purpose substantially described.

JOHN L. POPE. Witnesses:

W. H. BURRIDGE, S. BIGELOW.

